抄録
As a diagnostic application of the acoustic emission (AE) waveform analysis, crack inspection based on the moment tensor analysis is proposed. Because moment tensor components contain information on crack kinematics, the decomposition of eigenvalues of the moment tensor is possible and the contributions of shear motion and tensile motion to crack nucleation can be determined from the ratio of eigenvalues. Thus, cracks are classified into the type of dominant motion. After the crack types are determined, crack orientations can be decided from the directions of eigenvectors.
The procedure developed was applied to a pull-out test of anchor bolt and a cylindrical tension test. The results confirm the applicability of the procedure to inspecting internal cracks by the quantitative AE waveform analysis based on the moment tensor inversion.
